1 files changed, 0 insertions, 77 deletions
diff --git a/packages/frontend/src/use/use-scroll-position-keeper.ts b/packages/frontend/src/use/use-scroll-position-keeper.ts
deleted file mode 100644
index b584171cbe..0000000000
--- a/packages/frontend/src/use/use-scroll-position-keeper.ts
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-import { throttle } from 'throttle-debounce';
-import { nextTick, onActivated, onDeactivated, onUnmounted, watch } from 'vue';
-import type { Ref } from 'vue';
-
-// note render skippingがオンだとズレるため、遷移直前にスクロール範囲に表示されているdata-scroll-anchor要素を特定して、復元時に当該要素までスクロールするようにする
-
-// TODO: data-scroll-anchor がひとつも存在しない場合、または手動で useAnchor みたいなフラグをfalseで呼ばれた場合、単純にスクロール位置を使用する処理にフォールバックするようにする
-
-export function useScrollPositionKeeper(scrollContainerRef: Ref<HTMLElement | null | undefined>): void {
-	let anchorId: string | null = null;
-	let ready = true;
-
-	watch(scrollContainerRef, (el) => {
-		if (!el) return;
-
-		const onScroll = () => {
-			if (!el) return;
-			if (!ready) return;
-
-			const scrollContainerRect = el.getBoundingClientRect();
-			const viewPosition = scrollContainerRect.height / 2;
-
-			const anchorEls = el.querySelectorAll('[data-scroll-anchor]');
-			for (let i = anchorEls.length - 1; i > -1; i--) { // 下から見た方が速い
-				const anchorEl = anchorEls[i] as HTMLElement;
-				const anchorRect = anchorEl.getBoundingClientRect();
-				const anchorTop = anchorRect.top;
-				const anchorBottom = anchorRect.bottom;
-				if (anchorTop <= viewPosition && anchorBottom >= viewPosition) {
-					anchorId = anchorEl.getAttribute('data-scroll-anchor');
-					break;
-				}
-			}
-		};
-
-		// ほんとはscrollイベントじゃなくてonBeforeDeactivatedでやりたい
-		// https://github.com/vuejs/vue/issues/9454
-		// https://github.com/vuejs/rfcs/pull/284
-		el.addEventListener('scroll', throttle(1000, onScroll), { passive: true });
-	}, {
-		immediate: true,
-	});
-
-	const restore = () => {
-		if (!anchorId) return;
-		const scrollContainer = scrollContainerRef.value;
-		if (!scrollContainer) return;
-		const scrollAnchorEl = scrollContainer.querySelector(`[data-scroll-anchor="${anchorId}"]`);
-		if (!scrollAnchorEl) return;
-		scrollAnchorEl.scrollIntoView({
-			behavior: 'instant',
-			block: 'center',
-			inline: 'center',
-		});
-	};
-
-	onDeactivated(() => {
-		ready = false;
-	});
-
-	onActivated(() => {
-		restore();
-		nextTick(() => {
-			restore();
-			window.setTimeout(() => {
-				restore();
-
-				ready = true;
-			}, 100);
-		});
-	});
-}